Penetration Behavior of High-Density Reactive Material Liner Shaped Charge

Abstract

The traditional polytetrafluoroethylene (PTFE)/Al reactive material liner shaped charge generally produces insufficient penetration depth, although it enlarges the penetration hole diameter by chemical energy release inside the penetration crater. As such, a novel high-density reactive material liner based on the PTFE matrix was fabricated, and the corresponding penetration performance was investigated. Firstly, the PTFE/W/Cu/Pb high-density reactive material liner was fabricated via a cold pressing/sintering process. Then, jet formation and penetration behaviors at different standoffs were studied by pulse X-ray and static experiments, respectively. The X-ray results showed that the PTFE/W/Cu/Pb high-density reactive material liner forms an excellent reactive jet penetrator, and the static experimental results demonstrated that the penetration depth of this high-density reactive jet increased firstly and then decreased by increasing the standoff. When the standoff was 1.5 CD (charge diameter), the penetration depth of this reactive jet reached 2.82 CD, which was significantly higher than that of the traditional PTFE/Al reactive jet. Moreover, compared with the conventional metal copper jet penetrating steel plates, the entrance hole diameter caused by this high-density reactive jet improved 29.2% at the same standoff. Lastly, the chemical reaction characteristics of PTFE/W/Cu/Pb reactive materials were analyzed, and a semi-empirical penetration model of the high-density reactive jet was established based on the quasi-steady ideal incompressible fluid dynamics theory.

Investigation of Penetration Performance of Zr-based Amorphous Alloy Liner Compared with Copper

“…Wang et al [13] carried out a series of experiments at stand-offs of 1.0, 2.0 and 2.5 CD to determine the influence of PTFE/Al reactive liner thickness on the penetration performance of the shaped charge. Guo et al [14] fabricated a novel high-density reactive material liner based on the PTFE matrix and investigated the corresponding penetration performance. The static experimental results demonstrated that the penetration depth of this high-density reactive jet increased firstly and then decreased by increasing the stand-off.…”

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

“…Liu [ 14 ] used the grey system theory to analyze the influence laws of the related parameters on the formation of EFPs. In addition, many new materials have been applied to the liner of shaped charges [ 15 , 16 , 17 , 18 ], which improves the penetration capability and damage aftereffect of shaped charges. Müller [ 19 ] proved through experimental research that detonation waves in SCWS collide with each other and meet certain conditions that will form a Mach wave and produce overdriven detonation.…”

Study on the Formation of Reactive Material Shaped Charge Jet by Trans-Scale Discretization Method

“…According to the prior simulation estimation, the times of jet head reaching 1 CD (charge diameter) standoff (the distance between the jet head and the initial position of the liner bottom) and 2 CD standoff were obtained. It should be noted that, since the damage effect of the reactive material jet is greatly influenced by the standoff, and the optimum standoff of reactive material jet is about 1 CD-2 CD [20], thus the times corresponding to these two standoffs are selected. The two different times were then set for the two ray tubes as ray emission delay times, where the initial time corresponds to the moment of the detonator being initiated.…”